John came back from a safari in Africa. Upon arrival, he went to his friend, Mark, and told him of his adventures. “I was out in the jungle,” he said, “when all of a sudden I heard a noise in the bush behind me. Looking back, I saw a huge lion, licking his chops and smiling at me. The lion started coming my way and I started running, with the lion not far behind. When the lion was almost at my neck, he suddenly slipped, and I got ahead a bit. The lion started gaining on me again, and as he...